/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/ClusterUnionManager.h
typedef [TMap](API\Runtime\Core\Containers\TMap)< [EClusterUnionOperation](API\Runtime\Chaos\Chaos\Chaos__EClusterUnionOperation), [TArray](API\Runtime\Core\Containers\TArray)< [FPBDRigidParticleHandle](API\Runtime\Chaos\Chaos\FPBDRigidParticleHandle) * >> FClusterOpMap